All ports
Port5352/UDP
dns-llqPort
5352
Protocol
UDP
Category
Registered
Service
dns-llq
What is port 5352?
Port 5352/UDP is a Registered port, registered with IANA for specific applications. It is associated with the dns-llq service.
DNS Long-Lived Queries
Useful commands
nmapnmap -p 5352 -sV example.comnetcatnc -zv example.com 5352curlcurl -v http://example.com:5352/telnettelnet example.com 5352bash(echo > /dev/udp/example.com/5352) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 5352/udpDeny
sudo ufw deny 5352/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 5352 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 5352 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=5352/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 5352" dir=in action=allow protocol=UDP localport=5352Security Risks
- DNS cache poisoning attacks
- DDoS amplification using open DNS resolvers
- Information disclosure of internal subdomains
- Domain hijacking if DNS server is misconfigured
Frequently Asked Questions
What service runs on port 5352/UDP?
Port 5352/UDP is associated with the dns-llq service. DNS Long-Lived Queries
Is it safe to expose port 5352 to the Internet?
It depends on the service and configuration. Port 5352 (dns-llq) is a Registered port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 5352 is open?
You can use nmap: `nmap -p 5352 -sV example.com`, netcat: `nc -zv example.com 5352`, or the bash command: `(echo > /dev/udp/example.com/5352) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 5352 on my firewall?
On Linux with UFW: `sudo ufw allow 5352/udp` (open) or `sudo ufw deny 5352/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 5352 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 5352" dir=in action=allow protocol=UDP localport=5352`.
What applications and services use port 5352?
Port 5352/UDP is used by the dns-llq service. Specific uses depend on the software and configuration. Check our related tools section for more information.